Macdonald, Helen, and Gillian M. Johnson. “Validation of Back Pain Questionnaire in a Popoulation of New Zealand Adolescents”. New Zealand Journal of Physiotherapy 45, no. 3 (November 1, 2017): 126–134. Accessed November 22, 2024. https://nzjp.org.nz/nzjp/article/view/163.